Equal to the number of protons that are present in the nucleus of its atoms.
What is the atomic number?
100
This changes liquid to gas.
What is evaporation?
100
A mixture formed when one substance dissolves in another.
What is a solution?
100
Chemical substance capable of donating a hydrogen ion.
What is an acid?
100
CO2
What is Carbon Dioxide?
200
The science that deals with the composition and properties of matter.
What is chemistry?
200
Negatively charged particle.
What is an electron?
200
Positively charged particles.
What is a proton?
200
Elements that are alike in their number of protons and electrons, but differ in their atomic weight because of their differing numbers of neutrons in the nucleus.
What is an isotope?
200
The difference between SI and Si.
What is Sulfur Iodide and Silicon?
300
An atom that has acquired a positive or negative charge.
What is an ion?
300
Energy always flows from hot to.....
Cold
300
What causes particles to hit each other harder.
Heat.
300
This happens when something is heated.
It expands?
300
Type of bond that involves the sharing of electrons between atoms.
What is a covalent bond?
400
The byproducts of a reaction between an acid and a base.
What are salt and water?
400
The smallest units of elements.
What is an atom?
400
Type of bond formed when electrons are transferred form one atom to another.
What is an ionic bond?
400
The substance that does the dissolving in a solution.
What is the solvent?
400
Scale used to determine relative concentrations of acid and base
What is the pH scale?
500
Non-charged particles.
What is a neutron?
500
A chemical substance, usually containing a hydroxide ion.
What is a base?
500
Any substance composed of two or more different elements.
What is a compound?
500
This is between molecules of helium in a helium balloon.